Demis Hassabis on the limit in today's AI： language can describe the world， but it cannot contain it - and why "World Models" are his "longest standing passion".

Language models absorbed far more structure about reality from text than many researchers expected， because human language quietly carries physics， psychology， culture， tools， plans， and cause-and-effect.

But text is still a compressed residue of experience， not experience itself.

A sentence can say a cup falls from a table， yet it does not fully encode weight， grip， balance， friction， timing， sound， surprise， or the tiny motor corrections a body makes before it even notices them.

The world is not only made of facts that can be named； it is made of constraints that have to be lived through， touched， predicted， violated， and repaired.